How does gravity work?

[lauralovesyou]

I know it has something do do with gravity, but not 100% sure of the explanation.

 

[Oddbio]

well first think of the two extremes.
If the ramp is completely horizontal, then all of gravity is just pushing the marble against the ramp and the marble doesn't move. However, if the ramp is completely vertical, the marble will fall down just as if it had been dropped in midair.

when the ramp is anywhere there are two different components to the gravitational force then. Part if it is just being pushed against the ramp, and the other part is being pushed in the direction down the ramp. The component down the ramp gets larger the steeper the ramp is.